#include <iostream>
#include<cmath>
using namespace std;
int main()
{
int n,m,i,sum=0;
cin>>n>>m;
if(n>m) swap(n,m);
for(i=n;i<=m;i++){
if(sqrt(i)>=n&&sqrt(i)<=m&&sqrt(i)=ceil(sqrt(i)))
sum++;
}
cout<<sum;
return 0;
}